/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, #43cea2 0%, #185a9d 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 顶部导航栏 */
.top-nav {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    font-size: 24px;
    font-weight: 600;
    color: #185a9d;
    text-decoration: none;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.welcome-text {
    color: #666;
}

.logout-btn {
    padding: 8px 20px;
    background: linear-gradient(45deg, #43cea2, #185a9d);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.logout-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(67, 206, 162, 0.3);
}

/* 主要内容区域 */
.main-content {
    margin-top: 100px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
}

.page-title {
    font-size: 32px;
    margin-bottom: 30px;
    color: #185a9d;
    text-align: center;
}

/* 导航菜单 */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.menu-item {
    background: white;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    text-decoration: none;
    color: #333;
    border: 2px solid transparent;
}

.menu-item:hover {
    transform: translateY(-5px);
    border-color: #43cea2;
    box-shadow: 0 10px 20px rgba(67, 206, 162, 0.15);
}

.menu-item i {
    font-size: 36px;
    color: #185a9d;
    margin-bottom: 15px;
    display: block;
}

.menu-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #185a9d;
}

.menu-item p {
    color: #666;
    font-size: 14px;
    line-height: 1.5;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .main-content {
        margin-top: 80px;
        padding: 20px;
    }

    .menu-grid {
        grid-template-columns: 1fr;
    }

    .page-title {
        font-size: 24px;
    }
}